I'm not sure this is fair.
By displaying false information, they are point-blank lying. That's misinformation. It should be illegal - it could be.
Some other tricks such as 'creating very expensive items which they never expect to sell' as a cognitive 'price anchor' - well, not quite the same thing.
I suggest there is a distinction between falsehoods and other forms of tricks.
In the end it probably doesn't matter, but I wouldn't mind one bit if there was some consumer protections concerning this.